“The Vile Adviser without Mercy 冷酷的毒士 (lěng kù dè dú shì)”
Who is he:
His description portrays him as a mass-murderer, and history seems to back that up. After the death of Dong Zhuo 董卓, Jia Xu adviced Li Jue 李催 to take advantage of the chaos in Chang An 长安 and grab the Imperial power for himself. This would prove to be the biggest black mark on Jia Xu's life as Li Jue and Guo Si 郭汜 went on a rampage in Chang An, killing and abducting innocent civilians, burning and robbing property. Later historians place the blame squarely on Jia Xu for the holocaust. The fact is Jia Xu is an incredibly gifted advisor whose predictions have come true many times. The sad thing is his leaders did not always listen to him! While serving under Cao Cao 曹操, Jia Xu was one of the rare few who did not support the attack on Sun Wu 孙吴. Not heeding this advice, Cao Cao later met with disaster at Red Cliffs 赤壁之战. Years later while serving under Cao Pi 曹丕, Jia Xu again advised a defensive strategy instead of supporting Cao Pi's attack on either Sun Wu or Shu Han 蜀汉. Once again, his advise proved to be correct as Cao Pi was not victorious.
Character ability 1: "Unmitigated Murder 完杀 (wán shā)" [Enforced ability]
Within your turn, only yourself and players at Brink of Death can use PEACH 桃.
Character ability 2: "Descend into Chaos 乱武 (luàn wǔ)" [Single-Use Ability]
During your action phase, you can force all other players to choose between 1 of 2 options:
1. Use an ATTACK杀 on a player with the least distance from him/her
2. Lose 1 unit of health.
Character ability 3: "Behind the Curtain 帷幕 (wéi mù)" [Enforced ability]
All black-suited tool cards targeted on you will be cancelled.
Difference from Normal SanGuoSha:
The description for "Behind the Curtain" has been modified from "has no effect" to "will be cancelled". In effect, the character is unchanged except for this definition.
Ability's Relation to Story:
No direct link is made to "Unmitigated Murder", though it can be inferred that the game makers want to add drama to this "cold-blooded murderer". "Descend into Chaos" is referring to the massacre at Chang An carried out by Li Jue and Guo Si.
"Behind the Curtain" is interesting. Jia Xu happens to be the longest-living advisor in the Three Kingdoms Era, and the reason for this is rather unglamorous. He is remembered as someone who will save his own ass before the higher purpose. Numerous times he has switched allegiance as his leaders started to fail, finally ending up at Cao Wei 曹魏 till his death. Even then, Jia Xu stayed away from expressing emotions that would compromise his true thoughts. In his later years he became a recluse, and did not even speak in private to anyone else. The "Curtain" in this case is his silence and evasive character, making him less susceptible to ploys and schemes. Thus the ability is apt for him since it makes him impervious to a large number of tool cards.